1440972988 has 144 divisors (see below), whose sum is σ = 3280456704. Its totient is φ = 548674560.

The previous prime is 1440972983. The next prime is 1440972997. The reversal of 1440972988 is 8892790441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440972983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11346181 + ... + 11346307.

Almost surely, 2^1440972988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440972988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640228352).

1440972988 is an abundant number, since it is smaller than the sum of its proper divisors (1839483716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440972988 is a wasteful number, since it uses less digits than its factorization.

1440972988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 1440972988 is about 37960.1499997036. The cubic root of 1440972988 is about 1129.4975153844.

The spelling of 1440972988 in words is "one billion, four hundred forty million, nine hundred seventy-two thousand, nine hundred eighty-eight".